I have a real beauty on eBAY, and you get a warranty;
http://www.ebay.com/itm/Datsun-8-76-78-280z-RESTORED-Turn-Signal-Switch-SUPER-QUALITY-/141570142124?pt=Motors_Car_Truck_Parts_Accessories&hash=item20f63cefac&vxp=mtr
Thanks,
Daniel P.

Aftermarket reproductions were NEVER made for 77-78 280z bumper ends.
Nor were they made for 74-76 260z / 280z bumper ends.
This is why they are so expensive.
I have used intact ones if you are interested.